free instant messaging

Highly Secure Email, Chat, Instant Messaging, and Collaboration.

Instantbird is a multi-protocol Instant Messaging client.

123 Web Messenger is a real-time instant messaging software for your own website

Enterprise Instant Messaging - No Compromises.

Messaging platform for professionals (was TeamASAP).

Messaging app for VK.

Messaging client that supports Hangouts/Gtalk and XMPP.

Messaging & chat network app.

Instant search and offline access to any API documentation.

Instant screenshots sharing, annotation & managment.